Knife



Nov. 6, 1923.

T. CHAMPLIN KNIFE Filed June 17, 1922 INVENTOR.

77m Champ/In Patented Nov. 6, 1923.

TINT cHAMrL rN, or LITTLE VALLEY, NEW YORK.

KNIFE.

Application filed dune 17, 1922. Serial No. 569,159..

To all whom it may concern Be it known that I, TINT CHAMILIK, a citizenof the United States, residing at Little Valley, in the county "ofCattara'ugus and State of New York, have invented certain new and usefulImprovementsinKnives, of which the following is a specification.

This invention relates to an improvement in knives and particularly to aknife in the handle of which is imbe'ddeda compass such as is shown, forexainple', in my Patent No. 1,115,780 dated November 3, 1914.

As pointed out in that patent it has been found adv'a ntageous, insteadof making the portions of the knife in proximity to the compass ofnon-magnetic material, to make the knife in the usual manner of iron orsteel and s0 arrange and construct certain of the parts that they may beformed to function as a horseshoe magnet. The compass is so lo catedwith respect to this magnet that the attraction of the metal parts ofthe tool will be equalized and have no influence upon 7 the compassneedle.

The knife covered by my previous patent has proven to be entirelysuccessful but has been open to the objection that the magnetizedcan-opener blade and screw-driver and bottle-opener blade lose theirpower after a certain time. This action would be well understood if weconsider the fact that inhorseshoe magnets, such as these blades to allintents and purposes are, it is the general practice to provide a keeperfor each magnet which when the magnet is not in use will connect the twoends, thus preventing any loss of power.

The object of this invention is to provide in a knife of theconstruction shown in my earlier patent, keepers. which will connect theends of the magnetized blades when they are folded within the handle ofa knife, and thus prevent this loss of power.

Other objects will appear from an examination of the followingdescription taken in connection with the drawing which forms a partthereof and in which,

Figure 1 is a side elevation of a knife embodying this invention;

Fig. 2 is a similar view of the knife with the side cover in which thecompass is mounted removed; and

Figs. 3 and 4 are sectional views taken along the lines 3-3 and 4-4 ofFigs. 1 and 2, the can-opener and screw-driver and bottle-opener bladesbeing closed.

Referring tothe drawings the. reference numeral 10 is used to designatethe handle of a knife, forming one embodiment ofthis invention, providedwith a can-opener blade 11,1a screw-driver and bottle-opener blade12,51. leatherpunch blade 13, blade 14; blades 11 and 13' being placedat one end of the knife and blades 12 and 14 at the other end. Theblades are enclosed within the outer scales 15 and 16 and separated bythe intermediate scale 17 Suitable back springs 18 and 19 are providedto holdthe blades'in their proper position and on the outer scales aremounted the covers 20 and 21.

In the cover 21, near the blades 12 aiid.l4, is imbedded a compass 22and at each side of .the compass are imbedde'd'short stripsjof soft iron23 andv 24 whi'ch'bear against the scale 15 and have a function whichwill be described later. y I

The can open'e'r blade 11 and screw-driver and bottle-opener blade 12are both slightly magnetized. The legs 25 and 26 constitute the positiveand negative poles of the blade 11 while the legs 27 and 28constitutethe positive and negative poles of the blade 12.

Vhen the blades 11 and 12 are folded as shown in dotted lines in Fig. 2and in sections in Figs. 3 and 4 it will be noted that the soft ironstrip 23 extends across the poles 25 and 26 and the soft iron strip 24extends across the poles 2'7 and 28. Thus the strips 23 and 24 functionin the same manner as the keepers for horseshoe magnets previouslyreferred to. \Vhile these keepers are not directly'in contact with theblades 11 and 12 it has been found that by their use the magneticproperties of the blades have beem retained without impairment for along period. Since it is absolutely essentiol for the proper action ofthe compass needle that the blades 11 and 12 retain-their magnetism, theadvantage gained by theuse of such keepers is of the utmost importance.

The compass is mounted with the letters N and S on the dial in alinementwith'the blades 13 and 14 and the letter .N nearer the blade '14. Whenit is desired to determine direction the blades 13 and 14 are fullyopened, thus counterbalancing the action upon the compass needle. Theblades 11 and-12 however are placed in the half-open position shown inFig. 1 and form with the back spring 18 a complete horseshoe magnet madeup of two separate horseshoe magand a. cutting nets, that is to say theblades 11 and 12. With the knife blades so positioned and the knifeplaced upon a level surface so that the compass needle is free to moveit will be found that the needle, being unhampered, responds to themagnetic influences of the earth and points to the north and the knifeis turned until the blades 13 and 14: come into alinement with theneedle, at Which position it will be found that the blade 1d indicatesthe magnetic north pole of the earth.

While one embodiment only of this invention has been shown anddescribed, applicant is not to be limited thereby, since it is obviousthat other embodiments may be made withoutdeparting from the spirit andscope of the invention as set forth in the following claims.

Having thus described my invention, that which I claim asnew and forwhich I desire the protection of Letters Patent of the United States isthe following:

1. In a knife having a handle, a compass imbedded in said handle, andmagnetized blades pivoted at each end of said handle, each blade havingtwo legs, and keepers carried by said handle to extend across the legsof each blade when the blades are closed down into the handle of saidknife.

2. In a knife having a handle, a compass imbedded in said handle, andmagnetized blades pivoted at each end of said handle, each blade havingtwo legs, keepers imbedded in said handle to extend across the legs ofeach blade when the blades are closed down into the handle of saidknife.

3. A knife comprising a handle, a com pass imbedded in said handle,blades pivoted at each end of said handle, scales enclosing said blades,each of said blades being magnetized and including two legs, soft ironstrips in said handle bearing against one of said scales, said stripsbeing so located that they extend across the legs of said blades whenthe latter are closed down into the handle of said knife.

4., A knife comprising a handle, a compass imbedded in said handle,outer scales, a middle scale, blades pivoted at each end betweensaid'middle scale and one of said outer scales, each of said bladesbeing magnetized and including two legs, and soft iron strips in saidhandle at each side of said compass, said strips being so located thatthey extend across the legs of said pivoted blades when the latter areclosed down into the handle of said knife.

In testimony whereof I aflix my sig-V nature.

